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New classical economics contributed the methodology behind real business cycle theory [6] and new Keynesian economics contributed nominal rigidities (slow moving and periodic, rather than continuous, price changes also called sticky prices). [7] The new synthesis provides the theoretical foundation for much of contemporary mainstream economics.
Macroeconomics is traditionally divided into topics along different time frames: the analysis of short-term fluctuations over the business cycle, the determination of structural levels of variables like inflation and unemployment in the medium (i.e. unaffected by short-term deviations) term, and the study of long-term economic growth.
Real business-cycle theory (RBC theory) is a class of new classical macroeconomics models in which business-cycle fluctuations are accounted for by real, in contrast to nominal, shocks. [1] RBC theory sees business cycle fluctuations as the efficient response to exogenous changes in the real economic environment.
Other economists focused more on theory in their business cycle analysis. Most business cycle theories focused on a single factor, [9] such as monetary policy or the impact of weather on the largely agricultural economies of the time. [8] Although business cycle theory was well established by the 1920s, work by theorists such as Dennis ...
The multiplier–accelerator model can be stated for a closed economy as follows: [3] First, the market-clearing level of economic activity is defined as that at which production exactly matches the total of government spending intentions, households' consumption intentions and firms' investing intentions.
Keynesian economics advocates the use of automatic and discretionary countercyclical policies to lessen the impact of the business cycle. One example of an automatically countercyclical fiscal policy is progressive taxation. By taxing a larger proportion of income when the economy expands, a progressive tax tends to decrease demand when the ...
The two lines defining the center of the cycle divide the positive orthant into four regions. The figure below indicates with arrows the movement of the economy in each region. For example, the north-western region (high employment, low labor's share in output) the economy is moving north-east (employment is rising, worker's share is increasing).
The Lucas islands model is an economic model of the link between money supply and price and output changes in a simplified economy using rational expectations.It delivered a new classical explanation of the Phillips curve relationship between unemployment and inflation.